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Deletion of the Alternative Sigma Factor ς B in Staphylococcus aureus Reveals Its Function as a Global Regulator of Virulence Genes

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Kullik, Ines, Giachino, Philipp, Fuchs, Thomas·1998·Journal of Bacteriology

Abstract

A deletion of the sigB operon was constructed in three genetically distinct Staphylococcus aureus strains, and the phenotypes of the resulting mutants were analyzed. Compared to the corresponding wild-type strains, the Δ sigB mutants showed reduced pigmentation, accelerated sedimentation, and increased sensitivity to hydrogen peroxide during the stationary growth phase. A cytoplasmic protein missing in the Δ sigB mutants was identified as alkaline shock protein 23, and an extracellular protein excreted at higher levels in one of the Δ sigB mutants was identified as staphylococcal thermonuclease. Interestingly, most sigB deletion phenotypes were only seen in S. aureus COL and Newman and not in 8325, which was found to contain an 11-bp deletion in the regulator gene rsbU . Taken together, our results show that ς B is a global regulator which modulates the expression of several virulence factors in S. aureus and that laboratory strain 8325 is a ς B -defective mutant.

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Crossref · 10.1128/jb.180.18.4814-4820.1998

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Metadata

Authors
Kullik, I., Giachino, P., & Fuchs, T.
Venue
Journal of Bacteriology
Published
1998-09-15
Volume
180
Issue
18
Pages
4814-4820
ISSN
  • 0021-9193 (ISSN-L)
  • 1098-5530
OpenAlex
W1982777646
Cited by
324
References
29
FWCI
9.29
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Deletion of the Alternative Sigma Factor ς B in Staphylococcus aureus Reveals Its Function as a Global Regulator of Virulence Genes. https://app.cochat.ai/papers/10.1128/jb.180.18.4814-4820.1998
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Kullik, I., Giachino, P., & Fuchs, T. (1998). Deletion of the Alternative Sigma Factor ς B in Staphylococcus aureus Reveals Its Function as a Global Regulator of Virulence Genes. Journal of Bacteriology. https://doi.org/10.1128/jb.180.18.4814-4820.1998

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